Grate



J. R. HOBBS March 3, 1931.

GRATE 5 Sheets-Sheet 1 Filed Dec. 6, 1928 A TTORNE Y.

March 3, 1931. J HOBBS 1,795,127

GRATE Filed Dec. 6, 1928 3 Sheets-Sheet 2 INVENTOR.

J. R. HOBBS March 3, 1931.

GRATE Filed Dec. 6, 1928 3 Sheets-Sheet 5 Patented Mar. 3, 1931 UNITED STATES.

JAMES-n. HOBBS, or sit. nntnns, onneon.

GRATIQ Application filed December 6, 1928. Serial N0. 324,2 01.

The present invention is directed to improvements in grates, and more particularly to one designed for use in connection with steam boilers.

The primary object of the invention is to provide a device of this character so constructed that the same can be filled with water, and replenished at intervals, the water circulating through the device serving to pro test the same against the destructive action of the fire.

Another object of the invention is to provide a device of this kind constructed in such mannerthat the .water circulating through 1 the bars will become heated, and can be used as feed water for the boiler, or for other purposes. 1

Another object of the invention is to provide a boiler grate which is exceedingly simple in construction, durable, eflicient in operation, and one which can be manufactured at a very small cost.

With these and other objects in View, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated'in the accompanying drawings, in which Figure 1 is a bottom plan view of the device.

Figure 2 is a side elevation thereof.

Figure 3 is a longitudinal sectional view through one of the complete units, and a portion of the companion unit. 7

Figure 4 is an end view of one of the clamping plates.

Figure 5 is a detail sectional view through one of the rod connections.

Figure 6 is a diagrammatic view of the system for furnishing feed water to a boiler. The grate consists of a pair of units 1 and 2, each unit comprising a pair of tubular headers 3, said headers having their confronting sides formed with a plurality of openings 4, preferably four in number, said openings having beveled walls 5, the purpose of which will appear later.

The grate bars 6 of each unit are formed from tubular sheet metaland have their ends beveled, as at 7, for snugly fitting within the openings 4: of the headers 3. The bars are of such. length thatthe terminals thereof will project slightly into the headers when initijalLy assembled, the extendedends of said bars beingswaged, as at 7', to firmly unite the bars. and headers.

AbarG of each unit has passed therethrough; a tie 130d 8, the ends of which have t readed thereon clamping nuts 9 adapted to engage the rectangular plates 10, said plates having the-i1 corners turned at right angles to the plates, to provide feet 11 adapted to engage the inner surfaces of the walls of the. headers- 3 at points betweenthe ends of the bars 6. The feet-1E1 will obviously maintain the plates spaced from the ends of the. associated bars-topermit free circulation of water throughthe bars equipped with the rods.

, The nuts; when. forced into engagement with-the plates lO-willl hold the feet 11 of the the unit 1 has connected thereto a pipe 13 89 through which water from a suitable source is conducted into. said unit, and from thence through the pipe assembly 12 into the unit 2.

The outermost bar of the unit 2 is provided M V with a dischargepipe 14, the respective pipes being provided with suitable controlling valves, not shown. a p

The, discharge pipe 14 is preferably con nected toastoragetank 15by a pipe 16. The water from thetank can be used for any purpose desired, and can be used asfeed water for the boiler 17 by forcing the waterfrom the. tagnk by the pump 18 through the pipes 19.1

The headers 3 have carried thereby removable plugs 20 to permit insertion of a tool for swaging the ends of the grate bars 5.

A grate constructed in accordance with my invention will not only protect the bars a against intense heat, but will also heat the u 7 water circulating therethrough for use as What is claimed is-:

V ings of the headers, a tie rod passing through a r f the headers receiving the tapered ends of the I feed water for a boiler.

It will be of course understood that the grate bars 6 can be rectangular in cross secj tion,or any other shape desired. From the foregoing, it is thought that the construction, operation and many advan-fl tages ofthe herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape,

and proportion and minor details of con-.

struction, may be resorted to without depart ing, from the spirit or sacrificing any of the advantages of the invention.

. lyAcgrate including headers formed in their confronting sides with corresponding tapered'openings, hollow grate bars formed" with tapered ends fitted in the tapered opena grate bar'and of a length to proj ect slightly into each header, nuts Within the headers threaded on the ends of the tie rod, and abut ting elements on the ends of'the tie rod coni I fined between the nuts and the inner sides of bars. 7 v V '2. A grate including headers formed in their confronting sides With corresponding tapered openings, hollow grate bars formed v i with tapered ends fitted in the tapered opene ings ofthe headers, a tie rod passing through a grate bar and of a length to project slightly into each' header, nuts, within the headers threaded on the endsof the tierod, and abutting elements consisting of plates loosely mounted "on the threaded ends of the tie rod 7 and having portions bent to provide feet to engage the inner side of the headers adja-' cent the tapered ends of the grate bars.

1 3. A grate including headers formed in V I their confronting sides with corresponding tapered openings and having threaded; opens ings in their outer sides in line with the re-' "spe'ctive tapered openings, plugs closing the V threaded openings, hollow grate bars formed with tapered ends'fitted in the tapered open-i ingsof the headers, a tie rod p assing through a grate bar and of a" length to project slight- 'ly into each header, nuts within the headers threaded on the ends of the tie rod, and abutting elements consisting of plates loosely I mounted on the threaded ends of the tie'rod and having portions bent to provide feet to engage theinner'side of the 'header'sadja cent the tapered endsof the grate bars.

In testimony whereof I aflix'my signature.

JAMES R. HOBBS [n s], 

